Something In my #5 Cylinder?

T56MaxTorq said
Ring gaps butted together and popped the piston top? Can’t seem to tell in the pic. I run my gaps at .032 on cast pistons. But you’re running 10 psi w/o an intercooler on gasoline - risky combo. What is your timing retard pulled to at 10 psi?

Wow. Hadn't considered that. But a real possibility.

You can't see enough of the bore though to see the damage that happens to the bore when the rings butt.

But that's a very real possibility.